Grinding machine steady rest



' March 21; 1939.

c. G. FLYGARE ET AL 2,151,636 GRINDING MACHINE STEADY REST Filed July20, 1938 2 Sheet s-Sheet 1 INVENTORS EHRL GFLY GFJHE IRVING Fl. TFIYLORJ QWATTORNEY March 21, 1939. c. G. FLYGARE ET AL I 2,151,636 I GRINDINGMACHINE STEADY REST Filed July 20, 193B 2 Sheets-Sheet 2 "IIIII/IA'IIJ;

8? INVENTORS EFIHL G.,FLYGHHE IRVING H'THYLQR ATTORNEY Patented Mar. 21,1939 UNITED STATES PATENT OFFICE GRINDING MACHINE STEADY RESTApplication July 20, 1938, Serial No. 220,281

Claims.

The invention relates to grinding machines, and more particularly to awork steadying rest for a large roll grinding machine.

One object of the invention is to provide a simple thoroughly practicalwork steadying rest for a roll grinding machine of the grinding wheeltraverse type which is arranged so that the steadyrest shoes may bereadily adjusted from the control station on the reciprocating grindringwheel carriage. Another object of the invention is to provide animproved steadyrest construction in which both a horizontally adjustablesteadyrest shoe and a vertically adjustable work steadying shoe arearranged so that they may be readily adjusted from the control stationon the reciprocating grinding wheel carriage. Another object of theinvention is to provide a steadyrest having suitable adjustments wherebya wide range of. work sizes may be readily steadied without replacingthe steadyrest. Other objects will be in part obvious or in part pointedout hereinafter.

The invention accordingly consists in the features of construction,combinations of elements, and arrangements of parts, as will beexemplified in the structure to be hereinafter described, and the scopeof the application of which will be indicated in the following claims.

In the accompanying drawings, in which is shown one of various possibleembodiments of the mechanical features of this invention,

Fig. 1 is a fragmentary rear elevation of a roll grinding machine of thegrinding wheel traverse type haying the improved steadyrest mountedthereon;

Fig. 2 is a cross-sectional view, taken approximately on the line. 2-2of Fig. 1, on a slightly enlarged scale, showing the details of thesteadyrest construction and the adjustment therefor; and

Fig. 3 is a fragmentary sectional view of the lower steadyrest shoe,showing the application of. an adapter and a modified steadyrest shoefor use in grinding small diameter work pieces.

A roll grinding machine of the grinding wheel traverse type has beenillustrated in the drawings comprising a base 7 l0 which supports aswivel table II. The swivel table ll supports a rotatable work supportincluding a headstock (not shown) having a headstock center I3 and afootstock (not shown) having a footstock center I4 which are arrangedrotatably to support a Work piece, such as a roll 12 for a grindingoperation. A rotatable grinding wheel I5 is provided for grinding thework piece or roll I2 and is mounted on a transversely movable slide(not shown) which in turn is; supported on a longitudinally reciprocablecarriage (not shown) to facilitate a grinding wheel feeding movement anda traversing movement of the wheel relative to the 5 work piece. Thedetails. of the grinding wheel mount and its support have not beenillustrated since they are not considered to be part of the presentinvention and are well known features of a roll grinding machine of thegrinding wheel traverse type. For details of disclosure not found hereinas: to the grinding wheel traverse type cylindrical roll grindingmachine, reference may be had to the prior United States patent to C. H.Norton No. 1,096,188 dated May 12, 1914, to which 15 reference may behad for details of disclosure not contained herein.

In the operation of a roll grinding machine of. the grinding wheeltraverse type, it is customary to provide an operators control stationon the reciprocable grinding wheel carriage so that the operator ridesback and forth on the wheel carriage as the grinding proceeds. In orderto attain one object of the invention, an improved. steadyrest isprovided which is arranged so that it may be readily controlled andadjusted from the operating station on the reciprocable wheel carriageduring the grinding operation.

As illustrated in the drawings, the improved steadyrest comprises asteadyrest frame which is provided on its under surface with a partialdovetailed surface 2! which mates with a correspondingly shaped surface22 formed on the upper surface of the swivel table II. A clamping block23 having a surface mating with a portion of the dovetailed surface onthe swivel table II is utilized to clamp the steadyrest frame 20 rigidlyupon the swivel table H. A stud 24 is screw threaded into the frame 2|]and passes through a clearance hole in the clamping block 23. A nut 25threaded onto the outer portion of the stud 24 serves to lock theclamping block 23 in position to hold the steadyrest frame 20' rigidrelative to the swivel table II.

A horizontally adjustable work steadying shoe is arranged to engage thework piece or roll I2 at a point substantially in a horizontal planewith the axis of rotation of the work piece. The shoe 3!) is carried bya transversely adjustable slide 3! and is connected thereto by means. ofa pin 32. The slide 3| is slidably mounted within a transverselyadjustable housing 33. The housing 33 is adjustab-ly mounted on theframe 20 and is arranged so that it may be adjusted relative thereto ina horizontal direction either toward or from the axis of the work piece.The frame 20 is provided with a key or guideway 34 which is fixedlymounted thereto and projects above the surface thereof. A groove 35formed in the under side of the housing 33 is of suificien't widthslidably to engage the side faces of the key 34 to facilitate transverseadjustment of the housing 30. The housing 33 is provided with a T'-sl0t36' in its under surface by means of which the housing may be clampedrigidly in position on the frame 20 by clamping bolts 31 and 38. Thisadjustment above described serves to facilitate setting up thesteadyrest or for adjusting it When changing from one size work piece toanother.

A nut and screw mechanism is provided for adjusting the steadyrest shoe30 toward and from the work piece before and after a grinding operationand during grinding. A nut 40 is mounted in the left-hand end of theslide 3| and meshes with or engages a rotatable screw 4|-. The screw 4|is supported in a bearing 42 which is fixedly mounted within the housing33. The screw 4| is held against endwise movement by means of a flange43 formed integral therewith which bears against one end of the bearing42 and a collar 44 which is held in a fixed position on the cylindricalportion 45 of the screw 4| and which bears against the other end of thebushing 42. It will be readily apparent from the foregoing disclosurethat when the shaft 45 is turned to rotate the screw 4|, a transversemovement will be transmitted by the screw 4| and the nut 40 to move theslide 3| and the shoe 30 either toward or from the work axis.

In order to attain one object of the invention, a suitable mechanism isprovided to facilitate adjustment of the steadyrest shoe 30 from theoperator's control station on the reciprocating grinding wheel carriage.A manually operable knob 50 is mounted on the right-hand end of ahorizontally extending shaft (Fig. 2), the knob and shaft being spacedfrom and located above the work piece 20 and the knob 50 being locatedwithin easy reach of the operator's control station on the reciprocatinggrinding wheel carriage. The shaft 5| is slidably keyed by means of akey 52 within a rotatable sleeve 53 which. is journalled inanti-friction bearings 54 and 55 within a bearing bracket 56. Thebracket 56 is rigidly bolted to the upper portion of a verticallyextending bracket 51 which is securely fastened to'theside face of thesteadyrest frame 20.

A sprocket 58 is keyed by means of a key 59 with a rotatable sleeve 53and is connected by a link chain 60 with a sprocket 6|. The sprocket BIis rotatably supported in a bracket 62 which is fixedly mounted on thesteadyrest frame 20. The sprocket 6| is provided with a hub portion 63,the periphery of which serves as a bearing surface therefor. The shaft45 passes through a central aperture in the sleeve 63 and is slidablykeyed therein by means of a long key 64. This latter construction isprovided to permit a transverse movement of the housing 33 in setting upthe rest or in changing from grinding one sized Work piece to another.

It will be readily apparent from the foregoing disclosure that in anyposition of the housing 33, the operator from his control station on thereciprocating carriage may reach over the work piece, grasp the handwheel 50, and rotate the screw 4| to transversely adjust the position ofthe steadyrest shoe 30 during the grinding operation.

A lower steadyrest shoe 80 is arranged to engage the under surface ofthe work at a point below the work axis and between a vertical planepassing through the axis of the wheel and the line of contact betweenthe grinding wheel and the work piece. The shoe 80 is fixedly mounted onan adjustable slide member 8| by means of a pin 82. The slide 82 issupported by a pivotally mounted supporting member 83 which is connectedby means of a stud 84 with the frame 20. A rotatable screw 85 is screwthreaded into a threaded aperture 86 in the slide 8|. The screw 85 isprovided with an integral flange 8'! which bears against a thrust washer88 located at the bottom of an aperture 89 which surrounds and guidesthe slide 8|. It will be readily apparent from the foregoing disclosurethat rotation of the screw 85 by applying a wrench to the squaredportion 90. will cause an adjustment of the slide 8| relative to thesupporting member 03 so as to adjust the work steadying shoe 80 in adirection substantially toward or from the work axis. This adjustment isprovided to facilitate setting up the steadyrest.

In order to adjust the-position of the steadyrest shoe 89 during thegrinding operation, a mechanism is provided for swinging the supportingmember 83 about its pivot 84. This is preferably accomplished by meansof a nut and screw mechanism comprising a rotatable screw 9| which isrotatably supported in bearings 92 and 93 in the steadyrest frame 20.The screw 9| meshes with or engages a threaded aperture 94 within thesleeve 95 which is slidably sup-ported within an aperture 96 formed inthe steadyrest frame. A bracket 91 is fixedly mounted on the right-handend of the sleeve 95 and is connected by means of a stud 98 with a link99. The other end of the link 99 is pivotally connected by a stud I witha lever or link IOI, the lower end of which is pivotally connected by astud I02 with the steadyrest frame 20 The link or lever IOI supports astud I03 which is pivotally connected to the lower end of a link I04,the upper end of which is connected by a stud I with the pivotallymounted shoe supporting member 83. The links or levers IOI and I04 serveas toggle levers to produce a swinging adjustment of the pivotallymounted shoe supporting member 83 to facilitate adjustment of the shoe80 as the grinding operation proceeds.

The screw 9| is provided with an integral cylindrical shaft I06 which issupported in the bearings 92 and 93 and is held against endwise motionby means of an integral flange I0'I formed on the screw 9| and asprocket I 08 which is keyed and fastened to a reduced end portion ofthe shaft I06. It will be readily apparent from the foregoing disclosurethat rotation of the shaft I06 and the screw 9| produces an endwisemovement of the sleeve 95 which operates through the links or levers 99,IOI and I04 to swing the shoe supporting member 83 about its pivot 84 tocause the work steadying shoe 80 to approach or recede from the workaxis.

To facilitate a readily accessible adjustment for the shoe 80, a handwheel H0 is mounted on the outer end of a horizontally positioned shaftIII, both of which are located above the work piece I2, the wheel I I0being located within easy reach of the operator. The shaft III isslidably keyed by means of a key II2 within an aperture 3 in a rotatablesleeve 4 which is journalled in antifriction bearings H5 and H6. Thebearings H5 and H6 are in turn supported within a bearing bracket Il'lwhich is rigidly fastened to the vertically extending bracket 51. A-sprocket H8 is keyed to the outer end of the sleeve H4 and is connectedby means of a link chain- H9 with the sprocket I08 which is mounted onthe outer end of the feed screw 9|. It will be readily apparent from theforegoing disclosure that by rotation of the hand wheel H0, which isreadily accessible from the operators control station on thereciprocating grinding wheel carriage, the screw 9| may be rotated ineither direction so as to cause the lower work steadying shoe 80 toapproach or recede from the axis of the work piece.

The shafts 5i and Ill together with the hand wheels 50 and H0 may bemoved toward the left (Fig. 2) so that the shafts telescope within thesleeves 53 and l [4, respectively, to facilitate loading or unloadingthe work piece or roll l2 in a vertical direction by means of anoverhead crane.

If relatively small work pieces are to be ground with the steadyrest asillustrated in Fig. 2, the housing 33 may be adjusted transverselytoward the work axis by loosening the clamping bolts 31 and 38, afterwhich they may be locked in an adjusted position and the remainingadjustment made by rotatably adjusting the feed screw 4|.

For relatively small diameter work, such as shown in Fig. 3, an adapterbracket I20 is mounted on the upper surface of the pivotally mountedshoe carrying member 83 and the slide BI is replaced with a relativelylong slide 12! which fits within the aperture 89 and may be adjustablypositioned therein by rotation of the feed screw 85.

It will be readily appreciated from the foregoing disclosure that thissteadyrest, while adapted for use in grinding large cylindrical objectsin a traversing wheel type cylindrical or roll grinding machine, mayalso be utilized in grinding small diameter work on this type of machinewhen desired. In either case the work steadying shoes 30 and 80 may bereadily adjusted by the operator without leaving his control station onthe reciprocating grinding wheel carriage.

The operation of this improved steadyrest will be readily apparent fromthe foregoing disclosure. Assuming the steadyrest has been set up for agiven sized work piece, the work piece l2 to be ground is placed oncenters in the machine and the grinding operation is started, that is,the

grinding wheel is rotated and reciprocated longitudinally of the workpiece. By manipulation of the hand wheels 50 and I ID, the Worksteadying shoes 30 and 80, respectively, may be adjusted into supportingand steadying engagement with the peripheral surface of the work piecel2 and maintained in adjusted position relative thereto during thegrinding operation. As the work is ground away, the wheel 50 may berotated to adjust the steadyrest shoe 30 horizontally, and thesteadyrest shoe 80 may be adjusted in a radial direction, substantiallyvertical, by rotation of the hand wheel H0 which turns the screw 9| tocause the toggle levers Hll and I04 to approach a straight line positionas the shoe 8!] is fed toward the work axis to maintain it in supportingengagement with the periphery of the work piece during the grindingoperation.

It will thus be seen that there has been provided by this inventionapparatus in which the various objects hereinabove set forth togetherwith many thoroughly practical advantages are successfully achieved. Asmany possible embodiments may be made of the above invention and as manychanges might be made in the embodiment above set forth, it is to beunderstood that all matter hereinbefore set forth or shown in theaccompanying drawings is to be interpreted as illustrative and not in alimiting sense.

We claim:

1. In a grinding machine steadyrest having a frame, an adjustable worksteadying shoe on said frame, means including a nut and screw to adjustsaid shoe relative to the frame, and. a remote control thereforincluding a rotatable shaft which is spaced from said screw, a manuallyoperable hand wheel on one end of said shaft, and driving connectionsbetween the other end of said shaft and said screw to facilitateadjustment of the shoe.

2. In a grinding machine steadyrest having a frame, a horizontallymovable work steadying shoe on said frame, means including a nut andscrew to adjust said shoe relative to the frame, and a remote controltherefor including a rotatable shaft which is spaced from and arrangedparallel to said screw, a manually operable hand wheel on one end ofsaid shaft, and a chain and sprocket driving connection between theother end of said shaft and screw to facilitate adjustment of said shoe.

3. In a grinding machine steadyrest having a frame, a housing adjustablymounted thereon, means to adjust said housing relative to said frame, aslide within said housing, a work steadying shoe on said slide, meansincluding a nut and screw to adjust said slide and shoe relative to saidhousing, and a remote control therefor including a rotatable shaft whichis spaced from and arranged parallel to said screw, a hand wheel on oneend of said shaft, and a chain and sprocket driving connection betweenthe other end of said shaft and said screw.

4. In a grinding machine steadyrest having a frame, a horizontallyadjustable housing on said frame, means to adjust said housing relativeto said frame, a slide within said housing, a work steadying shoe onsaid slide, means including a nut and screw mechanism to adjust saidslide and shoe relative to said housing, a rotatable sleeve which isrotatably supported by said frame and spaced from and parallel to saidscrew, a chain and sprocket driving connection between said sleeve andsaid screw, and means including a manually operable hand wheel and shaftto support said Wheel which are slidably keyed within said sleeve tofacilitate adjustment of said shoe.

5. In a grinding machine steadyrest having a frame, a pivotally mountedshoe supporting member on said frame, a work steadying shoe adjustab-lymounted on said member, a pair of toggle levers which are operativelyconnected to swing said member so as to move the shoe toward or from thework axis, and means including a manually operable nut and. screwmechanism to actuate said toggle levers so as to adjust the position ofsaid shoe.

6. In a grinding machine steadyrest having a frame, a pivotally mountedshoe supporting member on said frame, a work steadying shoe adjustablymounted on said member, a pair of toggle levers which are operativelyconnected to swing said member so as to move the shoe toward and fromthe work axis, means including a nut and screw mechanism to actuate saidtoggle levers, and a remote control therefor including a rotatable shaftwhich is spaced from said screw, a manually operable hand wheel on oneend 01' said shaft, and driving connections between the otherend of saidshaft andv said screw to facilitate adjustment of the shoe.

7. In a grinding machine steadyrest having a frame, a horizontallymovable shoe adjustably mounted on said frame to engage and steady awork piece opposite the grinding; wheel, a. pivotally supported shoe toengage a workv piece from below, anindependent nut and screw mechanismfor independently adjusting each of said shoes, and a remote controltherefor. including. a pair of rotatable shafts spaced from. saidscrews, a manually operable hand wheel on each of. said shafts, anddriving connections between said shafts and said screws whereby. saidshoesmay. be independently adjusted.

8. In a grinding machine steadyrest having a frame, a horizontallyadjustable steadyrest shoe arranged to engage the work piece at a pointdiametrically opposite the line of contact between the wheel and work,means including. a manually operable nut and screw mechanism to adjustsaid shoe, a lower steadyrest shoe arranged to engage the lower surfaceof the work piece, a pivotally mounted supporting member for said lowershoe, a manually operable nut and screw mechanism to adjust the positionof said screw relative to said member, a pair of toggle leversoperatively connected between said pivotally mounted shoe supportingmember and said frame to facilitate movement of said shoe either towardor from the work axis, and means including a manually operable nut. andscrew mechanism to actuate said toggle levers.

9'. In a grinding machine steadyrest having. a frame, a horizontallyadjustable steadyrest shoe arranged to engage the work piece at a pointdiametrically opposite the line of contact between the wheel and work,means including a manually operable nut and screw mechanism to adjustsaid shoe, a lower steadyrest shoev arranged to engage the lower surfaceof the work piece, a pivotally mounted supporting member for said lowershoe, amanually operable nut and screw mechanism to adjust the'positionof said screw relative to said memberpa' pair of. toggle leversoperatively connected between said pivotally mounted shoe supportingmember and said frame to facilitate movement of said shoe either towardor from the work: axis, means including a manually operable nut andscrew mechanism to actuate said toggle levers, a, rotatable sleeve whichis rotatably supported on said; frame and spaced from and arranged.parallel to said latter screw, link chain and sprocket drivingconnections between said sleeve and said screw, and means including amanually operable hand wheel to rotate said sleeve; in either directionto facilitate adjustment of saidsteadyrest shoe.

10.; In. a grinding machine steadyrest having a frame, an adjustablehollow transversely arranged housing thereon, means to adjust saidhousing; relative to said frame in a transverse direction either towardor from the work axis, a slide within said housing, a work steadyingshoe on said slide, means including a nut and screw mechanism to adjustsaid slide and shoe relative to. saidhousing, and a remote controltherefor including a rotatable sleeve supported by said frame andarranged parallel to said screw, a sprocketon said sleeve, a sprocket onsaid screw, a. link chain driving connection between said sprockets, ashaft slidably keyed within said sleeve, a manually operable hand wheelon said shaft, saidshaft being arranged to telescope within said sleeveduring a work loading operation;

CARL G. FLYGARE. IRVING A. TAYLOR.

